Comcast recently rolled out (last month) 50 Mbps down / 5 Mbps up, they call it Extreme 50, it's $140/mo.
The only issue is you're still limited by the 250 GB/month transfer cap. My first month with 50/10 I did over 750 GB, and got a phone call about it:>
Meanwhile I see more Comcast commercials here telling me how good we have it, but no comparable service to back it up. Torches and pitchforks indeed.